From e3c680b0ce3a118bd49c05a7acccfebad01dbbfc Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?S=C3=B6nke=20Ludwig?= <sludwig@rejectedsoftware.com>
Date: Mon, 27 Mar 2017 16:32:24 +0200
Subject: [PATCH] Add assertion to ManualEvent to check for failure of creating
 event handles.

---
 source/vibe/core/sync.d | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/source/vibe/core/sync.d b/source/vibe/core/sync.d
index 78a356b..4b76bbd 100644
--- a/source/vibe/core/sync.d
+++ b/source/vibe/core/sync.d
@@ -923,8 +923,10 @@ struct ManualEvent {
 
 		() @trusted { logTrace("wait shared %s", cast(void*)&this); } ();
 
-		if (ms_threadEvent is EventID.invalid)
+		if (ms_threadEvent is EventID.invalid) {
 			ms_threadEvent = eventDriver.events.create();
+			assert(ms_threadEvent != EventID.invalid, "Failed to create event!");
+		}
 
 		SysTime target_timeout, now;
 		if (timeout != Duration.max) {